One of the best ways to see Alaska is by soaring through its trees on a zip line. Get geared up and then cross the four suspension bridges that climb to the site of the first zip line. You’ll then soar over and through the boreal forest while taking in stunning mountain views. There are eight different zip lines, each about 90 to 180 meters (or 300 to 600 feet) long. There's even a dual zip line where you can race another guest. The course is located about 10 minutes from Denali National Park and Preserve. Wear pants and closed-toe shoes, and dress in layers because it can get cold. Kids must be at least eight years old and weigh at least 32 kilograms (70 pounds), while adults must weigh 127 kilograms (280 pounds) or less.